CVE-2026-10571 IBM WebSphere Application Server Liberty is affected by a denial of service
A low-privileged administrative user can cause denial of service via insecure deserialization when the restConnector feature is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10571?
CVE-2026-10571 is a medium-severity unsafe deserialization vulnerability in Ibm Websphere Application Server, published on 13 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is affected by a denial of service caused by insecure deserialization. A low-privileged, administrative user could exploit this vulnerability to consume system resources when the restConnector-2.0 feature is enabled.
Weakness: CWE-502
Which versions are affected by CVE-2026-10571?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-10571?
No fix has been published for CVE-2026-10571 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-10571 being exploited?
There is no known exploitation of CVE-2026-10571 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-fcg5-434v-xp4q.